Missing Release of Resource after Effective Lifetime Affecting wasmtime-wasi package, versions <24.0.10>=25.0.0 <36.0.11>=37.0.0 <44.0.3>=45.0.0 <45.0.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Jun 2026
- disclosed15 Jun 2026
- creditalexcrichton
Introduced: 15 Jun 2026
CVE-2026-54786 (opens in a new tab)How to fix?
Upgrade wasmtime-wasi to version 24.0.10, 36.0.11, 44.0.3, 45.0.2 or higher.
Overview
wasmtime-wasi is a Crate defining the Wasi type for Wasmtime, which represents a WASI instance which may be added to a linker.
Affected versions of this package are vulnerable to Missing Release of Resource after Effective Lifetime via the fd_renumber process. An attacker can cause unintended resource retention and potential information disclosure by manipulating file descriptor renumbering operations.